Hello, I'm currently working with a set of date where I have a level one variable (daily observation), nested within participant (level 2 variable). I also have a variety of level 2 variables collected at pretest and a condition code. The problem I am having is with the condition code. Mplus is giving me the following message *** ERROR One or more between-level variables have variation within a cluster for one or more clusters. Check your data and format statement.

Between Cluster ID with variation in this variable Variable (only one cluster ID will be listed)

COND 2

The thing is i've checked the data (both my SPSS file and the exported .dat file i'm using)and there is no variation on the variable condition for the cluster identified.